Gas-engine body or frame.



A. B. SHULTZ.

GAS ENGINE BODY 0R FRAME.

APPLICATION FELED FEB. 26, ms.

' 1 226,820 my Patented May 2, 191?.

NE Vii.

i I posed upon the same and-notonly interfere reunion;

LATE;

ALBERT B. snows, or 311m nrnw scan.

1 ens-Enema BODY on FRAME.

To all whom it may concern:

Be it known that I, ALBERT B. S zer-Ta, a citizen of the United States, residing at Bi'ifialo, in the county of Erie and State of New York, have invented newand useful Improvements in Gas=Engine Bodies or Frames,of which the following is a specification.

This invention relates to gas engines and more particularly to such engines in which thebody or frame comprises upper and lower base sections which aredetachably connected with each other and one or more cylinders which are detachably mounted on the upper base section. In this type of gas engines which. are used v more particularly for motor boats and the like a plurality of cylinders are usually arranged in a longitudinal row so that the base is liable to bend, spring or sag underethe weight imwith I the free rotation of the main shaft which is mounted n the base but also cause displacement of other parts of the engine,

and thereby reduce its efficiency and also render the same liable to break. 7

i In the. bodies of gas enginesof this type as heretofore constructed the cylinders were also usually connected with the base by means of screws having their heads are ranged outside of the cylinders and passing through external annular flanges on the cylinders which construction is objection-- able for the reason that these :langes are liable to be broken off and are also unsi htly on the outer side of the body and di cult to keep clean.

It is one of'the objects of this invention to sodesignthe upper section of'the base uponwhich the crank shaft is mounted that the opposite longitudinal edges of the same which rest upon the lower base section are arranged at a point below the axis of the crank shaft bearings, whereby an arch or truss is formed transversely of the upper base section which effectually braces or strengthens this base section. and also resists any tendency of the crank shaft. hearings to sag out of their normal position.

Another object of, this invention is to so yconstructthe lower edge portions of the {up er base section that the same are materia ly stren' hened' without causi g any parts ofsuc strengthenin ject beyond the outer side 0 this section and also to arrange the connections between the means to pro- Specificationof Letters Patent. Patented. May 2 21, 1917;. Application filed February 26,1915; ScrialNo. 10,659. r

upper and lower base sections within gthef upper base section, thereby not only im proving the appearance of the same but a avoiding external obstructions which othefi f wise would render it difficult tokeep'the engine clean.

, A furtherobject of this inventionlis to so connect the cylinders of the body with the 1 base thereof that the fastening means are arranged -withinj. the "base and concealed ll from viewand the use of external connecting flanges is avoided and insteadthe lower ends of the water jacket are utilized to.receive the fastening bolts so that these water jackets serve the added purpose of connecting opposite ends of the cylinders andithus inders and the crank shaft bearings. o Similar characters of reference indicate corresponding parts in both figures.

Fig. 2 is a fragmentary longitir" dinal section thereof tamen through the (1 ,11

In its general organization the engine-" body containing my improvements comprises a lower base section 1, an upper base section 2 and a cylinder section 3. The

lower base section has its central part dished downwardly so as to form a pan or basin 4 and at its opposite longitudinal edges this pan is provided with outwardly projecting flanges lithe upper sides of whichare, pref-i 1 erably provided with channels or grfio es' ,6

adapted to receive the oil which drips downwardly from the upper external surfaces of the engine. v I T The upper base section comprises two iongitudinal side walls or sides 7, 7 which pref erably diverge downwardly and rest at their lower edges upon the longitudinal edges or flanges of the lower base section,

these Walls being provided at suitable places with hand holes 8 which are normally closed,

by covers 9 secured thereto by means'of screws 10, as shown, or other suitable means. The upper base section is preferably detachably connected with the lower 1 base section by means of upright screwsl'larranged adjacent to the inner side of the] longitudinal walls. of theupper base sec' ranged on the inne side of the lower basev 11 0 tion and passing th ough projections 12 arsection adjacent to opposite longitudinal also render it possible to. keep the engine clean more easily. These projections 12;;are"

preferably constructed in the fo1'm=-oi. ehan- 'nels extending lengthwise of theupp'eiigbase 5 section, as shown in the drawings, so that they also serve to materially strengthen the I same without any increase in weight.

Atsuitable intervals and adjacent to their opposite ends the longitudinal walls of'the upper base section are connected transverse webs 13which extend-substantially the.

entire height of these sides or walls and each of which is provided at its lower edge and midway between the longitudinalwalls of the upper base section with a segmental crankshaft bearing forming part of a complete bearing 14 in which the main or crank shaft 15 of the engine is journaled. Heretofore the axes of the several. bearings of the upper base section have been arranged horizontally in line with the joint between the upper and lower base sections which construction in the case of a very long engine I base having a large number of cylinders is objectionable for the reason that the base is liable to spring or bend under the weight imposed upon the same and permit the crank shaft bearings to sag to such an.ex

tent that this shaft would be displaced and not only bind in its bearings but also become cramped with reference to other parts associated therewith and therefore not only work improperly but also impair the eiiiciency or output of the engine as Well as increase the upkeep of the same. To avoid such sagging of the crank shaft bearings the same are so arranged on the webs of the upper base section that the lower edges of the walls of this section, are arranged below the axes of the crank shaft bearings, as shown in Fig. 1, in other words, the joint between the upper and lower base sections is below the axes of the crank shaft bearings. By thus arranging the axes of the crank shaft bearings above. the lower edges of the longitudinal walls of, the lower base section, a, pluralityv of transverse arches or trusses is produced which not only materially strengthens or stiliens the same as a whole but also pre vents the crank shaft bearings from sagging so thatvdisplacement of the crank shaft is positively prevented. This arching or bracing effect, of theup'perbase, section is further increased by reasmrbf the downwardly diverging arrangement I of the longitudinal walls thereoflso that-taken as a whole the several planes; otthe main surfaces otvthe V with each other, this being'due to thefact A 1 case section-are so arranged that; no, two of these planes are arranged parallelbase section is horizontal, the lower side thereof consists of two surface sect1ons which diverge or slant "downwardly from the crank shaft bearings to the longitudinal lower edges of the side walls, and the side walls diverge or slant downwardly from the top of the upper base section toward the bot tom thereof, as clearly shown in Fig. 1.

Furthermore by so constructing the supports for the crank shaft bearings so that the undersides of these supports diverge from the bearings downwardly to the resting edges of the upper base section greater clearance space is provided within the base in order to permit an attendant to readily gain access to thesebea'rings'for inspection, adjustment and repairs of the same and other parts within the base.

Each of the cylinders 16 of the cylinder section projects. with its lower end downwardly through an opening in the top of the upper base section and "is provided with a downwardly facing shoulder 17 which rests upon the upper edges of the longitudinal walls and the adjacent transverse webs.

Surrounding each of the cylinders is a water jacket or shell 18 which is separated from the latter so as to form an intervening water space 19 but is connected at its upper and lower ends with the corresponding upper and lower ends of the respective cylinder. At its lower end each of the water jackets or shells is thickened as shown at 20 and provided with downwardly opening screw threaded sockets 21. The latter are adapted to receive the upper ends of fastening screws 22 whichpass through internal lugs 23 at the upper edges of the longitudinal walls of the upper base section and have their headsbearing against the underside of said lugs.

upper base section are concealed from View and externally projecting bolts are avoided,

whereby the engine is not only improved in appearance but cleaning of the same is also more convenient.

By this means the fastenings which connect the cylinder sections with the Furthermore, by connecting the lower ends of the water j ackets d rectly with the upper base section these jac ets serve as a tie between the upper and lower ends of the cylinder and aid in materially strength ening the latter.

From the foregoing it will be clearly aphave heretofore been used so ely, foricooling purposes are now. also utilized to double the tie between the ends cf the cylinders and 130 whole, and by concealing within the base the fastenings which connect the upper base section with the lower base section and cylinder section, a smooth and finished external ap pearance of the engine body is produced.

N 0 claim is made in the present case for the means whereby the upper base section is secured to the lower base section and to the-cylinder, these features forming the subject of a separate application for patent which was filed October 29,1915, Serial No. a 58,577.

If desired the lower base section may be dispensed with in which case the upper section alone serves as the body and rests at its lower edges on a suitable support.

I claim as my invention:

1. A body for gas engines comprising a lower base section, and an upper base section having two longitudinal walls, the lower edges of which are secured to the lower base section and also having supports which are provided with crank shaft bearngs and which diverge on their under-sides from said bearings downwardly to the edges of said upper base section, the joint between said upper and lower base sections being arranged below the axes of said crank shaft bearings.

2 A crank case, comprising a body portion including sides and webs adjacent the opposite ends of said sides extendingsub stantially the entire height of said sides and having segmental crank; shait bearings formed in their bottom faces, said bottom faces slanting downwardly from said bearings to said sides.

Witness my hand this 24th day of February, 1915.

ALBERT B. SHULTZ. Witnesses:

Trrno. L. PoPP, ARMr} Harms. 

